粤北稻区稻纵卷叶螟的虫源地分析
Tracking the source regions of Cnaphalocrocis medinalis in the rice growing region of northern Guangdong Province
齐国君1 吕利华1 蓝日青2 谢金宏2 张伟群2
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作者单位：1. 广东省农业科学院植物保护研究所/广东省植物保护新技术重点实验室 广州 510640；
中文关键词：粤北稻区，稻纵卷叶螟，轨迹分析，虫源地
英文关键词：rice growing region of northern Guangdong Province, Cnaphalocrocis medinalis, trajectory analysis, insect source region
中文摘要：v
根据曲江地区12年稻纵卷叶螟Cnaphalocrocis medinalis Guenée的历史虫情资料，挑选了31个代表性的发蛾高峰日，利用HYSPLIT轨迹分析平台对其迁飞峰次进行轨迹分析，结果表明：粤北稻区稻纵卷叶螟早期迁入虫源地主要分布在海南及两广南部稻区，其中5月大多分布在海南及雷州半岛，6月主要分布在两广南部稻区；夏季迁出虫源的降落地分布在长三角稻区及安徽稻区；秋季回迁虫源的虫源地主要分布在安徽南部及长三角稻区，少部分来自浙南及闽北；秋季迁出虫源的降落地主要集中在海南南部和越南北部稻区；随着时间的推移，其早期迁入虫源地的时空分布由南向北依次偏移，存在明显的季节性差异，而夏秋季迁出虫源降落地和秋季回迁虫源地的时空分布没有明显的季节性差异。本研究初步明确了粤北地区稻纵卷叶螟南北往返迁飞的虫源衔接关系。
英文摘要： The geographic distribution of the source and landing areas of Cnaphalocrocis medinalis (Guenée) were analyzed using GIS (Geographic Information System), HYSPLIT, a trajectory analysis software package for the simulation of migration pathways, and data from daily field surveys conducted between 2000 and 2011 in Qujiang plant protection stations. We obtained the following results: Most of the early immigrants of C. medinalis came from Hainan Province in May and southern Guangdong and Guangxi in June. Most of the summer emigrants of C. medinalis are predicted to land in the rice growing regions of the Yangtze River Delta and Anhui Province. Most of the autumn immigrants came from the rice growing region of Yangtze River Delta and southern Anhui Province, but also from southern Zhejiang Province and northern Fujian Province. The autumn emigrants are predicted to land in southern Hainan Province and northern Vietnam. The spatio-temporal distribution of the source regions of the early immigrants is predicted to shift northward gradually with the change of season, but otherwise there are no obvious seasonal differences between months. This study provides a preliminary spatiotemporal model of the south to north migration of C. medinalis in rice growing region of northern Guangdong Province.